Continuous Fixed-Bed Column Study and Adsorption Modeling: Removal of Lead Ion from Aqueous Solution by Charcoal Originated from Chemical Carbonization of Rubber Wood Sawdust

Table 2

XRF analysis on the CRSD before and after adsorption of lead (%).

Elements	CRSD	Lead-loaded CRSD
O	31.24	24.183
C	61.41	60.17
Na	0.020	0.001
Ca	0.427	0.19
Pb	—	3.125
S	0.643	0.069
Cl	0.190	0.097
K	2.123	0.216